<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

<el-button type="text" @click="openChapterDialog()">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList" :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li v-for="video in chapter.children" :key="video.id">
                    <p>
                      {{ video.title }}

                <span class="acts">
                    
                    <el-button style="" type="text" @click="updateVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
              <el-input v-model="chapter.title"/>
              </el-form-item>
            <el-form-item label="章节排序">
        <el-input-number v-model="chapter.sort" :min="0" controlsposition="right"/>
        </el-form-item>
        </el-form>
            <div slot="footer" class="dialog-footer">
              <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
              <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
            </div>
    </el-dialog>
    
    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>

        <el-form-item label="上传视频">
        <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>
    </el-form-item>

      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
         <!--<el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>-->
      </div>
    </el-dialog>

  </div>
</template>
<script>
import video from '@/api/edu/video'
import chapter from '@/api/edu/chapter'

export default {
    data() {
        return {
            saveBtnDisabled:false,
            courseId:'',//课程id
            chapterVideoList:[],
            chapter:{ //封装章节数据
                title: '',
                sort: 0
            },
            saveVideoBtnDisabled:false,
            videoId:'',
            chapterId: '', // 课时所在的章节id
            video: {
                title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                videoOriginalName :'' //上传视频的名称
            },
            dialogChapterFormVisible:false,//章节弹框
            dialogVideoFormVisible:false, //小节弹框

            fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址,localhost:9001这个地址
        }
    },
    created() {
      //获取路由的id值
      if(this.$route.params && this.$route.params.id){
         this.courseId = this.$route.params.id
         //根据课程id查询章节和小节
          this.getChapterVideo()
      }
    },
    methods:{
      //点击确定调用的方法
      handleVodRemove(){
        //调用接口的删除视频的方法
        video.deleteAliyunvod(this.video.videoSourceId)
              .then(response => {
                //提示
                this.$message({
                    type: 'success',
                    message: '删除视频成功!'
                });
                //把文件列表清空
                this.fileList = []
                //把video视频id和视频名称值清空
                this.video.videoSourceId = ''
                this.video.videoOriginalName = ''
              })
              .catch(error =>{
                this.$message({
                    type: 'error',
                    message: '删除视频失败!'
                });
              })
      },
      //点击×调用这个方法
      beforeVodRemove(file,fileList){
           return this.$confirm(`确定移除 ${ file.name }？`);
      },
      //上传视频成功调用的方法
      handleVodUploadSuccess(response,file,fileList){
         //上传视频id赋值
            this.video.videoSourceId = response.data.videoId
            alert(this.video.videoSourceId)
            //上传视频名称赋值
            this.video.videoOriginalName = file.name
      },
      //上传之前调用的方法
      handleUploadExceed(){
          this.$message.warning('想要重新上传视频，请先删除已上传的视频')
      },

//==============================小节操作====================================
      //删除小节
      removeVideo(videoId){
         this.$confirm('此操作将永久删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                video.deleteVideo(videoId)
                    .then(response =>{//删除成功
                    //提示信息
                     //1，关闭弹框
                   this.dialogVideoFormVisible=false, //小节弹框
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
                    .catch(error =>{
                    this.$message({
                        type: 'error',
                        message: '删除失败!'
                    });

                })
            }).catch(() =>{//点击取消，执行catch方法
                     this.$message({
                        type: 'info',
                        message: '以取消删除!'
                    });
            }) 
      },
       //修改小节弹框数据回显
      updateVideo(videoId){
        //弹框
         this.dialogVideoFormVisible = true
        //调用接口
        video.getVideo(videoId)
          .then(response => {
            //this.video = response.data.video
            this.video = response.data.eVideo
        })
      },
      //弹出添加小节页面
      openVideo(){
          //弹框
          this.dialogVideoFormVisible = true
          //表单数据清空
          this.video.title = ''
          this.video.sort = 0
          this.video.sort = 0
          this.videoSourceId = ''
      },

      //添加小节弹框的方法
      openVideo(chapterId){
         //弹框
         this.dialogVideoFormVisible = true
          //每次打开弹窗清空列表
            this.video = {}
         //设置章节id
         this.video.chapterId = chapterId
         
      },
      //添加小节
      addVideo(){
        //设置课程id
          this.video.courseId = this.courseId
          video.addVideo(this.video)
           .then(response => {
                //关闭弹框
                this.dialogVideoFormVisible = false
                //提示
                this.$message({
                    type: 'success',
                    message: '添加小节成功!'
                });
                //刷新页面
                this.getChapterVideo()
              })
              .catch(error =>{
                this.$message({
                    type: 'error',
                    message: '添加小节失败!'
                });
              })
      },
      //修改小节
       updateVideo2(){
          video.updateVideo(this.video)
              .then(response => {
                //关闭弹框
                this.dialogVideoFormVisible = false
                //提示
                this.$message({
                    type: 'success',
                    message: '修改小节成功!'
                });
                //刷新页面
                this.getChapterVideo()
              })
              .catch(error =>{
                this.$message({
                    type: 'error',
                    message: '修改小节失败!'
                });
              })
       },
        //点击确定弹窗
      saveOrUpdateVideo(){
        if(!this.video.id){
                  this.addVideo()
        }else{
          this.updateVideo2()
        }
      },
     
        
//==============================章节操作====================================
      //删除章节
      removeChapter(chapterId){
        this.$confirm('此操作将永久删除章节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
                    .catch(error =>{
                    this.$message({
                        type: 'error',
                        message: '删除失败!'
                    });

                })
            }).catch(() =>{//点击取消，执行catch方法
                     this.$message({
                        type: 'info',
                        message: '以取消删除!'
                    });
            }) 
      },
      //修改章节弹框数据回显
      openEditChatper(chapterId){
        //弹框
         this.dialogChapterFormVisible = true
        //调用接口
        chapter.getChapter(chapterId)
          .then(response => {
            this.chapter = response.data.chapter
        })
      },
      //弹出添加章节页面
      openChapterDialog(){
          //弹框
          this.dialogChapterFormVisible = true
          //表单数据清空
          this.chapter.title = ''
          this.chapter.sort = 0
      },
      //添加章节
      addChapter(){
           //设置课程id到chapter对象里面
            this.chapter.courseId = this.courseId
              chapter.addChapter(this.chapter)
              .then(response => {
                //关闭弹框
                this.dialogChapterFormVisible = false
                //提示
                this.$message({
                    type: 'success',
                    message: '添加章节成功!'
                });
                //刷新页面
                this.getChapterVideo()
              })
              .catch(error =>{
                this.$message({
                    type: 'error',
                    message: '添加章节失败!'
                });
              })
      },
       //修改章节的方法
       updateChapter(){
          chapter.updateChapter(this.chapter)
              .then(response => {
                //关闭弹框
                this.dialogChapterFormVisible = false
                //提示
                this.$message({
                    type: 'success',
                    message: '修改章节成功!'
                });
                //刷新页面
                this.getChapterVideo()
              })
              .catch(error =>{
                this.$message({
                    type: 'error',
                    message: '修改章节失败!'
                });
              })
       },
      saveOrUpdate(){
        if(!this.chapter.id){
              this.addChapter()
        }else {
          this.updateChapter()
        }
      },
      //根据课程id查询章节和小节
      getChapterVideo(){
          chapter.getAllChapterVideo(this.courseId)
          .then(response => {
            this.chapterVideoList = response.data.allChapterVideo
          })
      },
        previous() {
            this.$router.push({path:'/course/info/'+this.courseId})
        },
        next() {
            //跳转到第二步
            this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>